烟草在生产管理上存在着众多矛盾,如产量与施肥、叶片与成熟度、叶面积与烟叶品质、绿色环保与有害物质残留、投资与成本等。但在烟草生长前期喷洒2~3次新丰2号,这些矛盾就会迎刃而解,株高增8.2%~25.6%,茎围增粗37.5%~90.6%,叶片多4.0~8.3片,节距缩短5.1%~9.7%,叶面积增加39.9%~76.7%,产量提高10.9%~63.8%,上等烟比值提高到35.2%~72.6%,经济效益增加32.6%~131.0%。 Tobacco production management there are many contradictions, such as yield and fertilization, leaf and maturity, leaf area and leaf quality, green and harmful residues, investment and cost. However, spraying 2 ~ 3 times of Xinfeng 2 at the early stage of tobacco growth will solve these contradictions. The plant height is increased by 8.2% -25.6%, the stems are thickened by 37.5% -90.6%, and the leaves are 4.0 ~ 8.3 pieces. The pitch is shortened 5.1% ~ 9.7%, leaf area increased by 39.9% ~ 76.7%, yield increased by 10.9% ~ 63.8%, superior smoke increased to 35.2% ~ 72.6%, and economic benefits increased by 32.6% ~ 131.0%.